#include <db.h>

int
DB_ENV->get_tx_max(DB_ENV *dbenv, u_int32_t *tx_maxp);  

The DB_ENV->get_tx_max() method returns the maximum number of active transactions currently configured for the environment. You can manage this value using the DB_ENV->set_tx_max() method.

The DB_ENV->get_tx_max() method may be called at any time during the life of the application.

The DB_ENV->get_tx_max() method returns a non-zero error value on failure and 0 on success.